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TI-2026-50125 Aliases CVE-2026-71553GHSA-vmg4-6gfg-83qx

ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS

Priority LOW 32CWE-1321Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

ApostropheCMS is an open-source Node.js content management system. In 4.32.0 and earlier, PATCH /api/v1/article/:id accepts the inherited path toString.call and passes it through the utility module to apos.util.set() and apos.util.get(), allowing an authenticated editor to overwrite the shared Object.prototype.toString function's call property and cause a persistent process-wide denial of service until restart.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00429 37th percentileScored 2026-11-07
Fix Fixed apostrophe (npm): 4.32.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
apostrophecmsapostropheup to 4.32.0—No fix listedCNA
—apostrophe (npm)before 4.32.14.32.1Patch availableGHSA-vmg4-6gfg-83qx
  • apostrophe Vendorapostrophecms Affected up to 4.32.0 Fixed in — No fix listed CNA
  • apostrophe (npm) Vendor— Affected before 4.32.1 Fixed in 4.32.1 Patch available GHSA-vmg4-6gfg-83qx

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:*——apostrophecms
  • cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:* Versions — — ·apostrophecms

Remediation

  • Fix · GHSA-vmg4-6gfg-83qx apostrophe (npm) Fixed in 4.32.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-71553
  2. 2026-10-03 Alias added: GHSA-vmg4-6gfg-83qx
  3. 2026-10-28 Fix available: npm/[email protected] · GHSA-vmg4-6gfg-83qx

References

Advisory 1

Other 3

  • TI-2026-25223 ApostropheCMS has Arbitrary File Write (Zip Slip / Path Traversal) in Import-Export Gzip Extraction CVSS 3.1CRITICAL 10.0
  • TI-2026-32848 Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html` CVSS 3.1CRITICAL 9.3
  • TI-2026-38664 @apostrophecms/seo Vulnerable to Stored XSS via Unsanitized Google Analytics / GTM ID Injected into Script Tag CVSS 3.1HIGH 8.7
  • TI-2026-27673 ApostropheCMS: Stored XSS in SEO Fields Leads to Authenticated API Data Exposure in ApostropheCMS CVSS 3.1HIGH 8.7
  • TI-2026-76992 Unauthenticated resource exhaustion via ApostropheCMS import routes CVSS 3.1HIGH 7.5
  • TI-2026-76974 ApostropheCMS leaves rejected CSV uploads in temporary directory CVSS 3.1HIGH 7.5
See all 65 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences